CN120583934A - Alcohol-free flavor composition - Google Patents

Abstract

The present disclosure provides an alcohol-free, and particularly ethanol-free, aqueous fragrance composition comprising: a solubilizer system comprising at least two nonionic surfactants, a solvent system, an essential oil, and water.

Description

Alcohol-free perfume composition

Technical Field

The present disclosure relates to a perfume composition. In particular, the present disclosure relates to an alcohol-free perfume composition, and to consumer products incorporating such perfume compositions.

Background

The background description includes information useful for understanding the present invention. No admission is made that any of the information provided herein is prior art or relevant to the presently claimed invention or that any disclosure that is explicitly or implicitly referenced is prior art.

Fragrance compositions generally contain alcohols, in particular ethanol, as solvents, since essential oils, such as essential oils, dissolve well in alcohols. However, ethanol is a volatile organic compound (volatile organic compound, VOC) and is controlled and regulated by environmental protection agencies. Solid perfumes (e.g., solid emulsions, gels, and hair oils) and flavored oils are alternatives to alcohol-based perfume compositions. However, their main disadvantage is that they leave smooth and greasy spots on the perfuming surface.

Water-based flavour compositions have also been reported in the prior art. However, aqueous-based compositions also have a number of disadvantages including limited amounts of essential oils that can be used in the formulation due to the hydrophobic (water insoluble) nature of the essential oils, the need for large amounts of solubilizing agents that result in highly viscous or foaming products that are unsuitable for use in pump spray dispensers, the need for high shear or complex ultrasonic techniques to form oil droplets in the nano/micro range in order to provide clear, homogenous nano/micro emulsions, and undesirable skin feel and skin irritation such as tackiness.

Despite improvements in water-based fragrance compositions, many of the problems remain unsolved or their solutions remain unsatisfactory. Accordingly, there is a need in the art for an alcohol-free aqueous perfume composition that overcomes the above-mentioned drawbacks of prior art compositions and provides generally satisfactory results. The present disclosure meets these needs and provides further related advantages.

Disclosure of Invention

Purpose(s)

It is an object of the present disclosure to provide an alcohol-free aqueous flavour composition.

It is another object of the present disclosure to provide an alcohol-free aqueous perfume composition comprising a higher perfume oil loading.

It is another object of the present disclosure to provide an alcohol-free aqueous perfume composition that is storage stable over a wide temperature range.

It is another object of the present disclosure to provide an alcohol-free aqueous perfume composition that can be formulated without the need for high shear or ultrasonic techniques to disperse or dissolve the perfume oil in the aqueous phase.

It is another object of the present disclosure to provide a sprayable alcohol-free aqueous perfume composition.

It is another object of the present disclosure to provide a non-sticky, non-greasy and/or non-irritating, alcohol-free aqueous fragrance composition.

It is another object of the present disclosure to provide an alcohol-free aqueous perfume composition that provides enhanced sensory properties when applied to human skin.

It is another object of the present disclosure to provide an alcohol-free aqueous perfume composition that is applicable to a wide range of personal care products.

It is yet another object of the present disclosure to provide a convenient and inexpensive method for producing an alcohol-free aqueous perfume composition.

The above and other objects are met by the present disclosure which, in one aspect, provides an alcohol-free and in particular alcohol-free aqueous perfume composition comprising:

a solubilizing agent system comprising at least two nonionic surfactants;

A solvent system;

essential oils, and

And (3) water.

According to embodiments of the present disclosure, the at least two nonionic surfactants may be selected from the group consisting of an alkanolamine polyether-7 (path-7), an alkanolamine polyether-9, an alkanolamine polyether-12, PEG-40-hydrogenated castor oil, sorbitan monolaurate, laureth-12, laureth-10, decanol polyether-12, cetostearyl alcohol polyether-20 (Cetearth-20), cetostearyl alcohol polyether-12 (Ceteareth-12), laureth-23, an alkanolamine polyether-20, polyglycerol-4 decanoate, PEG-40 stearate, and laureth-2.

In some embodiments, the solubilizing agent system comprises two nonionic surfactants. The two nonionic surfactants belong to different classes of nonionic surfactants, each class being selected from the group consisting of PEG alkyl ether, pegylated solubilizing agent, and ethoxylated alcohol.

In some embodiments, the solubilizing agent system comprises two nonionic surfactants that are an alkanolamine polyether-12 and PEG-40 hydrogenated castor oil. In some embodiments, the solubilizing agent system comprises two nonionic surfactants that are laureth-10 and PEG-40 hydrogenated castor oil. In some embodiments, the amount of the alkanol polyether-12 in the perfume composition may range from 1.5wt.% to 10wt.%, based on the total weight of the perfume composition. In some embodiments, the amount of laureth-10 in the perfume composition may range from 1.5wt.% to 10wt.%, based on the total weight of the perfume composition. In some embodiments, the amount of PEG-40 hydrogenated castor oil in the perfume composition may range from 1wt.% to 10wt.%, based on the total weight of the perfume composition. In some embodiments, the weight ratio of PEG-40 hydrogenated castor oil to the alkanolamine polyether-12/laureth-10 in the fragrance composition ranges from 1:3 to 3:1.

The solvent system includes at least one selected from the group consisting of diethylene glycol monoethyl ether (DEGMEE), ethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and dipropylene glycol monoethyl ether. The amount of polyethylene glycol ether in the flavour composition ranges from 0.2wt.% to 2.6wt.%, based on the total weight of the flavour composition.

The solvent system may further comprise one or more polyols selected from the group consisting of dipropylene glycol, 1, 3-propanediol, butylene glycol, hexylene glycol, and 2-methyl-1, 3-propanediol. The amount of the one or more polyols may range from 0.002wt.% to 10wt.%, based on the total weight of the perfume composition.

In some exemplary embodiments, the solvent system comprises a combination of DEGMEE and dipropylene glycol.

The essential oil may be used in an amount ranging from 3wt.% to 12wt.%, based on the total weight of the perfume composition.

The amount of water used in the alcohol-free aqueous flavour composition ranges between 60 and 90wt.%, preferably between 60 and 80wt.%, based on the total weight of the flavour composition.

In various embodiments, the alcohol-free aqueous perfume composition is sprayable, for example, by means of a manual spray pump dispenser (including those particularly suitable for atomizing water-based perfumes).

In another aspect, the present disclosure relates to a method for preparing an alcohol-free, in particular alcohol-free, aqueous perfume composition. The method comprises the following steps:

a. preparing phase-1 by combining water with an optional buffer to form a homogeneous aqueous phase;

b. preparing phase-2 by combining a solubilizing agent system, a solvent system, an essential oil, and optionally a preservative and a UV stabilizer;

c. adding phase-2 to phase-1 and homogenizing the combined phase, and

D. Optionally mixing an antifoaming agent with the combination to obtain a stable, clear aqueous flavour composition.

Various objects, features, aspects and advantages of the present subject matter will become more apparent from the following detailed description of preferred embodiments.

Detailed Description

The following is a detailed description of embodiments of the present disclosure. The details of the embodiments enable clear communication of the present disclosure. The amount of detail offered is not intended to limit the anticipated variations of embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure as defined by the appended claims.

Herein, alcohol refers to ethanol. Near zero means <0.03% by weight of the formulation.

A formulation is considered stable if it does not exhibit any phase separation or turbidity (NTU value. Ltoreq.30) when stored at room temperature for a period of 2 weeks to 36 months. It must also not exhibit any phase separation and/or turbidity (NTU value +.30) when stored at lower temperatures (4 ℃ to 10 ℃) or higher temperatures (45 ℃ to 55 ℃) for a continuous period of 24 hours to 36 hours.

The term "essential oil" as used herein is to be construed broadly to include natural and/or synthetic aromatic oils (aromatic oils) and blends thereof, wherein at least 70wt.% of the composition is characterized by a log P value below 2.

The terms "essential oil", "essential component", "perfume oil" and "perfuming ingredient" are interchangeable terms having the same meaning throughout the description.

The present disclosure provides an alcohol-free and in particular alcohol-free aqueous perfume composition comprising:

a solubilizing agent system comprising at least two nonionic surfactants;

A solvent system;

essential oils, and

And (3) water.

As noted above, the perfume compositions of the present disclosure employ a solubilizing agent system comprising at least two nonionic surfactants in combination with a solvent system to disperse or dissolve the perfume oils in water. Surprisingly, it has been found that a specific combination of nonionic surfactant and solvent system produces an unexpected solubilization effect which increases the solubility of the essential oil(s) in water, thereby promoting higher loading of the essential oil in the aqueous phase and promoting uniform distribution thereof without any adverse effect on the stability, viscosity and organoleptic properties of the essential composition, and which allows for the direct transfer of the essential oil(s) into water to form a single phase, clear and temperature stable essential composition without the application of Gao Jiaoban forces, such as high shear or ultrasonic mixing.

According to an embodiment of the present disclosure, the at least two nonionic surfactants are selected from the group consisting of an alkanol polyether-7, an alkanol polyether-9, an alkanol polyether-12, PEG-40-hydrogenated castor oil, sorbitan monolaurate, a laureth-12, a laureth-10, a decanol polyether-12, a cetostearyl alcohol polyether-20, a cetostearyl alcohol polyether-12, a laureth-23, an alkanol polyether-20, a polyglycerol-4 decanoate, PEG-40 stearate, and laureth-2. The at least two nonionic surfactants are present in the perfume composition in a total amount of 2wt.% to 20wt.%, based on the total weight of the perfume composition.

In some embodiments, the solubilizing agent system comprises two nonionic surfactants. The two nonionic surfactants belong to different classes of nonionic surfactants, each class being selected from the group consisting of PEG alkyl ethers, pegylated solubilizing agents, and ethoxylated alcohols. In embodiments, the two nonionic surfactants are selected from the group consisting of an alkanol polyether-7, an alkanol polyether-9, an alkanol polyether-12, PEG-40-hydrogenated castor oil, sorbitan monolaurate, a laureth-12, a laureth-10, a decanol polyether-12, a cetostearyl alcohol polyether-20, a cetostearyl alcohol polyether-12, a laureth-23, an alkanol polyether-20, a polyglycerol-4 decanoate, PEG-40 stearate, and laureth-2. The combined weight percent of the two nonionic surfactants ranges from 2.5wt.% to 20wt.%, based on the total weight of the perfume composition.

In some embodiments, the solubilizing agent system comprises two nonionic surfactants that are an alkanolamine polyether-12 and PEG-40 hydrogenated castor oil. In some embodiments, the solubilizing agent system comprises two nonionic surfactants that are laureth-10 and PEG-40 hydrogenated castor oil. In some embodiments, the amount of the alkanol polyether-12 in the perfume composition may range from 1.5wt.% to 10wt.%, based on the total weight of the perfume composition. In some embodiments, the amount of laureth-10 in the perfume composition may range from 1.5wt.% to 10wt.%, based on the total weight of the perfume composition. In some embodiments, the amount of PEG-40 hydrogenated castor oil in the perfume composition may range from 1wt.% to 10wt.%, based on the total weight of the perfume composition. In some embodiments, the weight ratio of PEG-40 hydrogenated castor oil to the alkanolamine polyether-12/laureth-10 in the perfume composition ranges from 1:4 to 4:1, preferably from 1:3 to 3:1.

The solvent system includes at least one polyethylene glycol ether selected from the group consisting of diethylene glycol monoethyl ether (DEGMEE), ethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and dipropylene glycol monoethyl ether. The amount of polyethylene glycol ether in the flavour composition ranges from 0.2wt.% to 2.6wt.%, based on the total weight of the flavour composition.

The solvent system may further comprise one or more polyols selected from the group consisting of dipropylene glycol, 1, 3-propanediol, butylene glycol, hexylene glycol, and 2-methyl-1, 3-propanediol. The amount of the one or more polyols may range from 0.002wt.% to 10wt.%, based on the total weight of the perfume composition.

In certain embodiments, the solvent system comprises a combination of DEGMEE and dipropylene glycol.

Essential oils are mixtures of aromatic compounds whose primary function is to produce fragrances or regulate malodor. The term "essential oil" as used herein maintains its typical and usual meaning in the art, i.e. a lipophilic organic liquid which is substantially insoluble in water and consists of one or more ingredients of natural and/or synthetic origin, which produces any kind of olfactory reaction, including attractive, pleasant, floral, aromatic, spicy and woody odors. In particular, essential oils include any perfuming ingredient or any mixture of perfuming ingredients currently used in the perfumery, for example, compounds capable of imparting a hedonic olfactive effect to the composition to which they are added. The perfuming ingredients can be of natural or synthetic origin. In general, the perfuming ingredients belong to different classes of compounds, comprising, but not limited to, alcohols (excluding ethanol), ketones, aldehydes, terpenes, ethers, esters, acetates and essential oils of natural or synthetic origin. The term "essential oil" as used herein is to be construed broadly to include commercially available essential oils, wherein at least 70wt.% of the composition is characterized by a log P value of less than 2.

Examples of essential oils useful in the compositions of the present disclosure include C6-C12 aldehydes, anisaldehyde, acetal R, acetophenone, acetyl cedrene (ACETYLCEDRENE), adoxaldehyde (adoxal), allyl amyl glycolate (ALLYLAMYL GLYCOLATE), allyl cyclohexapropionate (allyl cyclohexanepropionate), alpha-damascone (a-damascone), beta-damascone, delta-damascone, malvalactone, ambergris ether (ambroxan), Amyl cinnamic aldehyde, amyl cinnamic aldehyde dimethyl acetal, amyl valerate (AMYL VALERIANATE), amyl salicylate (AMYL SALICYLATE), isoamyl acetate (isoamyl acetate), isoamyl salicylate (isoamyl salicylate), hesperetin (aurantiol), eugenol acetate (acetyl eugenol), santalol (Bacdanol), benzyl acetate, benzyl alcohol, benzyl salicylate, linalool acetate (bergamyl acetate), and, Borneol acetate (bornyl acetate), butyl butyrate, p-tert-butylcyclohexanol, p-tert-butylcyclohexyl acetate (p-t-butylcyclohexyl acetate), o-tert-butylcyclohexanol (o-t-butylcyclohexanol), benzaldehyde, benzyl formate, caryophyllene (caryophyllene), kemidone (cashmerane), carvone (carvone), cypress methyl ether (cedramber), cypress acetate (CEDRYL ACETATE), cedrol (cedrol), salesmoschus (celestolide), cinnamyl alcohol (cinnamic alcohol), cinnamyl aldehyde (CINNAMIC ALDEHYDE), cis-jasmone (cis-jasmone), citral (citril), citral dimethyl acetal (CITRAL DIMETHYL ACETAL), citrasal, citronellal (citronellal), citronellol (citronellol), citronellyl acetate (citronellyl acetate), a combination of a plurality of such, Citronellyl formate (citronellyl formate), citronellonitrile (citronellyl nitrile), tricyclodecenyl acetate (cyclaset), mesona aldehyde (CYCLAMEN ALDEHYDE), tricyclodecenyl propionate (cyclaprop), dragon (caron), coumarin (coumarin), cinnamyl acetate (CINNAMYL ACETATE), 6-C6-C13 lactone, dimethylbenzyl methanol (dimethylbenzylcarbinol), and, Dihydrojasmone (dihydrojasmon), dihydrolinalool (dihydrolinalool), dihydromyrcenol (dihydromyrcenol), dimethylheptanol (dimetol), dimeric myrcenol (dimyrcetol), diphenyloxy (diphenyl oxide), ethylvanillin (ETHYL VANILLIN), eugenol (eugenol), fructosyl ester (fruitate), fenchyl alcohol (fenchyl alcohol), phenethyl phenyl acetate (PHENYLETHYL PHENYL ACETATE), Jiale musk (galaxolide), gamma-C6-C13 lactone, geraniol (geraniol), geranyl acetate (GERANYL ACETATE), geranyl formate (geranyl formate), geranonitrile (GERANYL NITRILE), methyl dihydrojasmonate (hedion), heliotropin (helional), piperonal (heliotropin), cis-3-hexanol (cis-3-hexanol), cis-3-hexenyl acetate (cis-3-hexenyl acetate), and, Cis-3-hexenyl salicylate (cis-3-hexenyl salicylate), hexyl cinnamaldehyde (hexylcinnamic aldehyde), hexyl salicylate (hexyl salicylate), hyacinth dimethyl acetal (HYACINTH DIMETHYL ACETAL), 2-phenylpropanol (hydrotropic alcohol), hydroxycitronellal (hydroxycitronellal), indole (indole), ionone (ionone), Isobornyl acetate (isobornyl acetate), isocyclocitral (isocyclocitral), ambroxol (IsoE Super), isoeugenol (isoeugenol), isononyl acetate (isononyl acetate), isobutylquinoline (isobutylquinoline), benzyl acetate (jasmal), jasmonate (jamolactone), jasminone (jasmopirane), carvone (corvone), ligustral (ligustoral), and combinations thereof, Convallaria (lilial), lime oxide (lime oxide), limonene (limonene), linalool (linalool), linalool oxide (linalool oxide), linalyl acetate (LINALYL ACETATE), neovalal (lyral), chamomile (manzanate), myol, dihydrolinalool acetate (MENTHANYL ACETATE), menthonate, methyl anthranilate (METHYL ANTHRANILATE), Methyl eugenol (methyl eugenol), menthol (menol), alpha-methyl ionone (a-methylionone), beta-methyl ionone, gamma-methyl ionone, methyl isoeugenol (methyl isoeugenol), methyl lavender ketone (METHYL LAVENDER ketone), methyl salicylate (METHYL SALICYLATE), gu Baige aldehyde (muguet aldehyde), alloocimene alcohol (mugol), musk (TM-11) (musk TM-II), Musk 781, musk C14, musk T, musk ketone, tibetan musk (musk tibetene), umbelliferone (musk moskene), citral (MYRAC ALDEHYDE), methyl phenylacetate (METHYLPHENYL ACETATE), nerol (nerol), nerol acetate (NERYL ACETATE), noracetate Bo Zhi (nopyl acetate), nopol (nopyl alcohol), neobergamot ester (neobergamate), and a combination thereof, Oak moss No.1, irone (orivone), raspberry ketone (oxyphenylon), p-cresol methyl ether (p-CRESYL METHYL ETHER), cyclopentadecanolide (pentalide), phenethyl alcohol (PHENYLETHYL ALCOHOL), phenethyl acetate (PHENYLETHYL ACETATE), phenylacetaldehyde (PHENYLACETALDEHYDE), dimethyl acetal (DIMETHYL ACETAL), alpha-pinene (a-pinene), and, Is prepared from furan (rubafuran), crystalline rose (rosephenone), rose ether (rose oxide), artificial sandalwood (Sandalore), santalol (Sandela), artificial sandalwood (Santalex), santalol (Santalinol), storax acetate (STYRALYL ACETATE), storax propionate (styralyl propionate), terpineol (terpineol), terpineol acetate (TERPINYL ACETATE), Tetrahydrolinalool (tetrahydrolinalool), tetrahydrolinalool acetate (tetrahydrolinalyl acetate), tetrahydrogeranyl (tetrahydrogeraniol), tetrahydrogeranyl acetate (tetrahydrogeranyl acetate), musk emetha (tonalide), musk tessellate (traseolide), glossy privet aldehyde (tripral), daphnetin (thymol), vanillin (vanillin), o-tert-butylcyclohexyl acetate (verdox), and, Beta-naphthylmethyl ether (yara yara), fennel oil (anis oil), bay oil (bay oil), rosewood oil (bois de-rose oil), ylang-ylang oil (cananga oil), cardamon oil (caramon oil), cinnamon oil (cassia oil), cedar wood oil (cedarwood oil), orange oil (orange oil), citrus oil (mandarin oil), kumquat oil (TANGERINE OIL), basil oil (basil oil), basil oil (orange oil), Nutmeg oil (nutmeg oil), citronella oil (citronella oil), clove oil (clove oil), coriander oil (coriander oil), olive oil (elemi oil), eucalyptus oil (eucaryptus oil), fennel oil (fennel oil), suaeda salsa oil (galbanum oil), geranium oil (geranium oil), momordica oil (hiba oil), juniper oil (hinoki oil), jasmine oil (jasmine oil), Lavandula oil (lavandin oil), lavender flower oil (lavender oil), lemon oil (lemon oil), lemongrass oil (lemongrass oil), lime oil (lime oil), neroli oil (neroli oil), oak oil (oak moss oil), amomum-timothy oil (ocotea oil), patchouli oil (patchouli oil), peppermint oil (PEPPERMINT OIL), perilla oil (perillaoil), (PETITGRAIN OIL), Pine oil (pine oil), rose oil (rose roil), rosemary oil (rosemary oil), camphor oil (camphor oil), linaloe oil (ho leaf oil), sage oil (CLARY SAGE oil), sandalwood oil (sandalwood oil), spearmint oil (SPEARMINT OIL), lavender flower oil (SPIKE LAVENDER oil), star anise oil (STAR ANISE oil), thyme oil (thyme oil), Black bean tincture (tonka bean tincture), turpentine (turpentine oil), vanilla bean tincture (vanilla bean tincture), vetiver oil (vetiver oil), bergamot oil (bergamot oil), ylang oil (YLANG YLANG oil), grapefruit oil (grapefruit oil), grapefruit (crab orange) oil (yuzu (Citrus Junos Tanaka) oil), benzoin (benzoin), Peruvian balsam (balsam peru), tulu balsam (balsam tolu), tuberose oil (tuberose oil), musk tincture (musk tincture), castor oil tincture (castrium tincture), civet tincture (civet tincture), ambergris tincture (ambergris tincture) and mixtures thereof.

The terms "essential oil", "essential component", "perfume oil" and "perfuming ingredient" are interchangeable terms having the same meaning throughout the present specification.

In various embodiments, the essential oil may be used in the alcohol-free aqueous perfume composition in an amount of between 3wt.% and 12wt.%, based on the total weight of the perfume composition.

In some embodiments, the ratio of essential oil to solvent system in the composition is less than 1. In some embodiments, the ratio of essential oil to solvent system in the composition is greater than 1.

The amount of water used in the alcohol-free aqueous flavour composition ranges between 60wt.% and 90wt.%, preferably between 60wt.% and 80wt.%, based on the total weight of the flavour composition.

In embodiments, the total irritation score of the alcohol-free aqueous perfume composition, as measured by the colorimetric mildness index (Colorimetric Index of Mildness) of the keratinous surface assay (corneosurfametry), is greater than 30, and greater than 30 is considered non-irritating and mild to the skin.

In some embodiments, the alcohol-free aqueous perfume composition as described herein may further comprise an antifoaming agent, such as simethicone. When present, the amount of such defoamer is between 0.001wt.% and 0.03wt.% based on the total weight of the perfume composition.

In various embodiments, the alcohol-free aqueous perfume composition as described herein may further comprise one or more cosmetic ingredients, such as lubricants, humectants, cooling agents (cooling agents), vitamins, antioxidants, buffers, preservatives, and/or UV stabilizers. These ingredients are well known in the fragrance art and the proportions are well established and known to those skilled in the art. For example, cosmetic/fragrance ingredients are described in "Perfume and Flavour Chemicals", s.arctander, allured Publishing Corporation,1994, il, usa, which is incorporated herein by reference.

In various embodiments, specific combinations of the solubilizing agent system and solvent system according to the present disclosure are capable of preparing transparent sprayable perfume compositions that exhibit stability at room temperature for periods ranging from 2 weeks to 36 months.

In various embodiments, the alcohol-free aqueous perfume composition as described herein remains stable at temperatures ranging from 5 ℃ to 50 ℃ for a period of 3 months to 9 months.

In various embodiments, the alcohol-free aqueous perfume composition as described herein remains clear (turbidity less than or equal to 30 NTU) and stable for at least 24 hours at temperatures as low as 5 ℃ and as high as 50 ℃ in continuous exposure.

In various embodiments, the alcohol-free aqueous perfume composition is sprayable, for example, by means of a manual spray pump dispenser (including those particularly suitable for atomizing water-based perfumes).

In various embodiments, the alcohol-free aqueous perfume composition has a viscosity in the range of about 5cps to about 15 cps.

The alcohol-free aqueous perfume composition as described herein is in the form of a leave-on composition. The term "leave-on composition" as used herein refers to a composition that is applied to a surface (e.g., human skin) and that does not require a subsequent step of cleaning the surface after application to remove the composition. This means that the composition stays on the surface after application.

In various embodiments, the alcohol-free aqueous perfume composition as described herein may be formulated as a personal care product or a home care product.

In some embodiments, the alcohol-free aqueous fragrance composition is formulated as a personal care formulation for leave-on application to skin, e.g., fragrance sprays, deodorant sprays, and face/body sprays.

In some embodiments, the alcohol-free aqueous perfume composition as described herein comprises a perfume oil suitable for air freshening purposes.

In another aspect, the present disclosure relates to a method for preparing an alcohol-free, in particular alcohol-free, aqueous perfume composition. The method comprises the following steps:

a. preparing phase-1 by combining water with an optional buffer to form a homogeneous aqueous phase;

b. preparing phase-2 by combining a solubilizing agent system, a solvent system, an essential oil, and optionally a preservative and a UV stabilizer;

c. adding phase-2 to phase-1 and homogenizing the combined phase, and

D. An antifoaming agent is optionally mixed with the combination to obtain a stable clear aqueous flavour composition.

All components and features of the method are defined above for the perfume composition.

In one exemplary embodiment, the solubilizing agent system comprises a combination of a pegylated solubilizing agent (e.g., PEG-40 hydrogenated castor oil) and a PEG alkyl ether (e.g., C12-15 alkanol polyether-7 to 12).

In another exemplary embodiment, the solubilizing agent system comprises a combination of a pegylated solubilizing agent (e.g., PEG-40 hydrogenated castor oil) and a PEG alkyl ether (e.g., C12-14 laureth-7 to 15).

In further exemplary embodiments, the solvent system comprises a combination of a polyethylene glycol ether (e.g., DEGMEE) and a polyol (e.g., dipropylene glycol).

The alcohol-free aqueous perfume compositions of the present disclosure exhibit a much higher retention of perfume ingredients on the substrate compared to alcohol-based formulations. In some embodiments, the alcohol-free aqueous perfume composition exhibits at least 30% higher retention of some desired perfume ingredients on the substrate than in the case of alcohol-based formulations.

In some embodiments, the alcohol-free aqueous perfume composition of the present disclosure is substantially free of silicone carriers. These near zero (less than 0.03 wt.%) silicone formulations may carry only a small amount of silicone-based defoamer, such as simethicone.

While the foregoing is directed to various embodiments of the present disclosure, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The present invention is not limited to the embodiments, forms or examples described, which are included to enable one of ordinary skill in the art to make and use the invention in connection with information and knowledge available to one of ordinary skill in the art.

Examples

The disclosure is further illustrated in the form of the following examples. However, it should be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the invention. Various changes and modifications to the disclosed embodiments will be apparent to those skilled in the art. Such changes and modifications are made without departing from the scope of the present invention. Suitable procedures for preparing the flavour compositions will be apparent to those skilled in the art.

Working examples

Examples 1 to 8 were prepared according to the ingredients and amounts shown in table 1 below. Embodiments 1 to 8 were found to be stable at room temperature when stored for a period of 2 weeks to 36 months without phase separation or turbidity (NTU value +.30), and furthermore, they also did not exhibit phase separation and/or turbidity (NTU value +.30) when stored for a continuous period of 24 to 36 hours at lower temperatures (4 ℃ to 10 ℃) or higher temperatures (45 ℃ to 55 ℃).

TABLE 1

* RT refers to room temperature.

* Elevated temperature refers to temperatures ranging from about 45 ℃ to about 55 ℃.

* Lower temperature refers to temperatures ranging from about 4 ℃ to about 10 ℃.

* Measurements and observations were made within 15 minutes of the respective conditions.

* Excipients include one or more of lubricants, wetting agents, cooling agents, vitamins, antioxidants, buffers, preservatives and/or UV stabilizers, and defoamers.

* In examples 1 to 4, the essential oil used was Mesmerize LF Mod Max from IFF. In examples 5 to 8, the essential oil used was Frozen thread from Robertet.

Comparative example:

comparative examples 1 to 10 were prepared according to the ingredients and amounts shown in the following table 2:

TABLE 2

* RT refers to room temperature

* Elevated temperature refers to temperatures ranging from about 45 ℃ to about 55 ℃.

* Lower temperature refers to temperatures ranging from about 4 ℃ to about 80 ℃.

* Measurements and observations were made within 15 minutes of the respective conditions.

* Excipients include one or more of lubricants, wetting agents, cooling agents, vitamins, antioxidants, buffers, preservatives and/or UV stabilizers well known to those skilled in the art.

* In c.ex 1 to c.ex 5, the essential oil used is Mesmerize LF Mod Max 2 from IFF.

* In c.ex 6 to c.ex 10, the essential oil used is Frozen thread from Robertet.

* QS refers to a sufficient amount.

* QS to 100 means a sufficient amount to bring it to 100.

Comparative examples C.Ex 1 and C.Ex 2 demonstrate that when PEG-40 hydrogenated castor oil or alkanol polyether-12 alone is used as the solubilizing agent (nonionic surfactant), the resulting composition is unstable. Turbidity and oil separation were observed in compositions containing only PEG-40 hydrogenated castor oil or alkanol polyether-12 as solubilizers when stored at room temperature and elevated temperature, whereas those compositions containing both PEG-40 hydrogenated castor oil and laureth-10/alkanol polyether-12 were found to be stable under the same storage conditions (see, working examples Ex 1 to Ex 8). This indicates that the presence of at least two nonionic surfactants is necessary to obtain the compositions of the present invention. Furthermore, the inventors have also concluded during their experiments that the two non-ions configured must come from two different categories. In Ex 1 and Ex 2, the two nonionic surfactants present belong to two different classes. Without being bound by theory, it appears that this heterogeneous mixture of nonionic surfactants appears to help achieve the desired level of solubilization.

Comparative example 5 containing PEG-40 hydrogenated castor oil and decyl glucoside as nonionic surfactants and c.ex 10 containing PEG-40 hydrogenated castor oil and polysorbate-20 did not provide stable products, while those compositions containing specific combinations of nonionic surfactants according to the present disclosure exhibited the desired stability. The inventors have observed that the choice of the class of nonionic surfactant can also determine not only the perfume solubility in some way, but also the perfume loading capacity and aesthetics. Other classes of nonionic surfactants (e.g., polysorbates) than decyl glucoside (an alkyl glucoside) are also not functional outside the scope of the present invention. This suggests that the choice of nonionic surfactant is critical to achieving a stable product.

Comparative examples 3 and 4 show that when the nonionic surfactant is used in a ratio outside the scope of the present disclosure, the resulting composition is unstable.

When the nonionic surfactant was used in the absence of a solvent system as in comparative example 6, the resulting composition was found to exhibit instability. The solvent system is very similar to the solubilizer, with substantial assistance to stability, aesthetics and sensory experience.

The composition of comparative example c.ex 7 shows that when the nonionic surfactant is used at a concentration outside the scope of the present disclosure, the resulting composition is unstable.

The compositions of comparative examples c.ex 8 and c.ex 9 containing no dipropylene glycol or DEGMEE and propylene glycol as solvent became turbid at elevated temperatures during storage, while those compositions containing specific solvents (solvent systems) according to the present disclosure were stable under the same conditions (see, working examples Ex 1 to Ex 8). This indicates that the choice of solvent is critical to the stability and aesthetics of the composition.

Embodiments using more than 2.5% polyethylene glycol ether (DEGMEE) are not considered, as there are regulatory restrictions on the use of DEGMEE beyond 2.6%. On the other hand, examples with a higher proportion (more than 10 wt.%) of dipropylene glycol are not included, as these examples violate the object of the present invention, i.e. the least amount of polyol as possible is used.

Claims (15)

1. A non-alcoholic aqueous perfume composition comprising:

A solubilizing agent system;

A solvent system;

essential oils, and

And (3) water.

2. The perfume composition of claim 1, wherein the composition is free of ethanol.

3. The perfume composition of claim 1, wherein the solubilizing agent system comprises two nonionic surfactants.

4. The fragrance composition of claim 3, wherein the nonionic surfactant is selected from the group consisting of an alkanol polyether-7, an alkanol polyether-9, an alkanol polyether-12, PEG-40-hydrogenated castor oil, sorbitan monolaurate, laureth-12, laureth-10, decanol polyether-12, cetostearyl alcohol polyether-20, cetostearyl alcohol polyether-12, laureth-23, an alkanol polyether-20, polyglycerol-4 decanoate, PEG-40 stearate, and laureth-2.

5. The perfume composition of claim 4, wherein the combined weight percent of the two nonionic surfactants ranges from 2.5wt.% to 20wt.% based on the total weight of the perfume composition.

6. The perfume composition of claim 1, wherein the solubilizing agent system comprises an alkanol polyether-12 and PEG-40 hydrogenated castor oil.

7. The fragrance composition of claim 1, wherein the solubilizing agent system comprises laureth-10 and PEG-40 hydrogenated castor oil.

8. The fragrance composition of claim 1, wherein the solvent system comprises at least one polyethylene glycol ether selected from the group consisting of diethylene glycol monoethyl ether (DEGMEE), ethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and dipropylene glycol monoethyl ether.

9. The flavour composition of claim 1, wherein the solvent system is present in the flavour composition in an amount ranging from 0.2wt.% to 2.6wt.%, based on the total weight of the flavour composition.

10. The fragrance composition of claim 1, wherein the solvent system further comprises one or more polyols selected from the group consisting of dipropylene glycol, 1, 3-propanediol, butylene glycol, hexylene glycol, and 2-methyl-1, 3-propanediol.

11. The fragrance composition of claim 1, wherein the solvent system comprises a combination of DEGMEE and dipropylene glycol.

12. The perfume composition of claim 1, wherein the perfume oil is present in the perfume composition in an amount ranging from 3wt.% to 12wt.%, based on the total weight of the perfume composition.

13. The flavour composition of claim 1, wherein water is present in the flavour composition in an amount ranging from 60wt.% to 90wt.%, based on the total weight of the flavour composition.

14. The fragrance composition of claim 1, further comprising one or more cosmetic ingredients selected from the group consisting of defoamers, lubricants, humectants, coolants, vitamins, antioxidants, buffers, preservatives, and UV stabilizers.

15. A process for preparing an alcohol-free aqueous perfume composition comprising the steps of:

a. preparing phase-1 by combining water with an optional buffer to form a homogeneous aqueous phase;

b. preparing phase-2 by combining a solubilizing agent system, a solvent system, an essential oil, and optionally a preservative and a UV stabilizer;

c. Adding the phase-2 to the phase-1 and homogenizing the combined phase, and

D. optionally mixing an antifoaming agent with the combination to obtain a stable clear aqueous flavour composition.